I've generally avoided getting into any discussions, either in-person or online, with anyone that holds any of the myths as fact. As the saying goes, "you can't fix stupid".
But, yesterday someone was claiming that despite Zimmerman pulling that family out from under a flipped truck, he was still a bad man because he was stalking Trayvon. I sarcastically remarked that stalkers always call the police to notify them when they are in the act of stalking!
Especially when you plan on shooting them. You particularly want to time it so that the police are just pulling up when you gun down your victim. George tried but Trayvon messed things up by starting a fist fight. George had to shoot him a couple of minutes too early so he didn't get the popo dash-cam video of it he was hoping for.